Zapras fix for BSD (bug #1801)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3168 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_zapras.c

@@ -20,7 +20,11 @@
 #include <asterisk/options.h>
 #include <sys/ioctl.h>
 #include <sys/wait.h>
+#ifdef __linux__
 #include <sys/signal.h>
+#else
+#include <signal.h>
+#endif /* __linux__ */
 
 #include <stdlib.h>
 #include <unistd.h>